X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=synfig-core%2Fsrc%2Fmodules%2Fmod_gradient%2Fradialgradient.cpp;fp=synfig-core%2Fsrc%2Fmodules%2Fmod_gradient%2Fradialgradient.cpp;h=5c3d20b61523db05519b7fa8a654ddd86b978dde;hb=a095981e18cc37a8ecc7cd237cc22b9c10329264;hp=0000000000000000000000000000000000000000;hpb=9459638ad6797b8139f1e9f0715c96076dbf0890;p=synfig.git

diff --git a/synfig-core/src/modules/mod_gradient/radialgradient.cpp b/synfig-core/src/modules/mod_gradient/radialgradient.cpp
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+/* === S Y N F I G ========================================================= */
+/*!	\file mod_gradient/radialgradient.cpp
+**	\brief Implementation of the "Radial Gradient" layer
+**
+**	$Id$
+**
+**	\legal
+**	Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
+**	Copyright (c) 2007 Chris Moore
+**
+**	This package is free software; you can redistribute it and/or
+**	modify it under the terms of the GNU General Public License as
+**	published by the Free Software Foundation; either version 2 of
+**	the License, or (at your option) any later version.
+**
+**	This package is distributed in the hope that it will be useful,
+**	but WITHOUT ANY WARRANTY; without even the implied warranty of
+**	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+**	General Public License for more details.
+**	\endlegal
+*/
+/* ========================================================================= */
+
+/* === H E A D E R S ======================================================= */
+
+#ifdef USING_PCH
+#	include "pch.h"
+#else
+#ifdef HAVE_CONFIG_H
+#	include <config.h>
+#endif
+
+#include <synfig/string.h>
+#include <synfig/time.h>
+#include <synfig/context.h>
+#include <synfig/paramdesc.h>
+#include <synfig/renddesc.h>
+#include <synfig/surface.h>
+#include <synfig/value.h>
+#include <synfig/valuenode.h>
+
+#include "radialgradient.h"
+
+#endif
+
+/* === U S I N G =========================================================== */
+
+using namespace etl;
+using namespace std;
+using namespace synfig;
+
+/* === G L O B A L S ======================================================= */
+
+SYNFIG_LAYER_INIT(RadialGradient);
+SYNFIG_LAYER_SET_NAME(RadialGradient,"radial_gradient");
+SYNFIG_LAYER_SET_LOCAL_NAME(RadialGradient,N_("Radial Gradient"));
+SYNFIG_LAYER_SET_CATEGORY(RadialGradient,N_("Gradients"));
+SYNFIG_LAYER_SET_VERSION(RadialGradient,"0.1");
+SYNFIG_LAYER_SET_CVS_ID(RadialGradient,"$Id$");
+
+/* === P R O C E D U R E S ================================================= */
+
+/* === M E T H O D S ======================================================= */
+
+/* === E N T R Y P O I N T ================================================= */
+
+RadialGradient::RadialGradient():
+	Layer_Composite(1.0,Color::BLEND_STRAIGHT),
+	gradient(Color::black(),Color::white()),
+	center(0,0),
+	radius(0.5),
+	loop(false),
+	zigzag(false)
+{
+}
+
+bool
+RadialGradient::set_param(const String & param, const ValueBase &value)
+{
+	IMPORT(gradient);
+	IMPORT(center);
+	IMPORT(radius);
+	IMPORT(loop);
+	IMPORT(zigzag);
+
+	return Layer_Composite::set_param(param,value);
+}
+
+ValueBase
+RadialGradient::get_param(const String &param)const
+{
+	EXPORT(gradient);
+	EXPORT(center);
+	EXPORT(radius);
+	EXPORT(loop);
+	EXPORT(zigzag);
+
+	EXPORT_NAME();
+	EXPORT_VERSION();
+
+	return Layer_Composite::get_param(param);
+}
+
+Layer::Vocab
+RadialGradient::get_param_vocab()const
+{
+	Layer::Vocab ret(Layer_Composite::get_param_vocab());
+
+	ret.push_back(ParamDesc("gradient")
+		.set_local_name(_("Gradient"))
+	);
+
+	ret.push_back(ParamDesc("center")
+		.set_local_name(_("Center"))
+	);
+
+	ret.push_back(ParamDesc("radius")
+		.set_local_name(_("Radius"))
+		.set_description(_("This is the radius of the circle"))
+		.set_is_distance()
+		.set_origin("center")
+	);
+
+	ret.push_back(ParamDesc("loop")
+		.set_local_name(_("Loop"))
+	);
+
+	ret.push_back(ParamDesc("zigzag")
+		.set_local_name(_("ZigZag"))
+	);
+
+	return ret;
+}
+
+inline Color
+RadialGradient::color_func(const Point &point, float supersample)const
+{
+	Real dist((point-center).mag()/radius);
+
+	if(zigzag)
+	{
+		dist*=2.0;
+		supersample*=2.0;
+		if(dist>1)dist=2.0-dist;
+	}
+
+	if(loop)
+	{
+		dist-=floor(dist);
+
+		if(dist+supersample*0.5>1.0)
+		{
+			float  left(supersample*0.5-(dist-1.0));
+			float right(supersample*0.5+(dist-1.0));
+			Color pool(gradient(1.0-(left*0.5),left).premult_alpha()*left/supersample);
+			if (zigzag) pool+=gradient(1.0-right*0.5,right).premult_alpha()*right/supersample;
+			else		pool+=gradient(right*0.5,right).premult_alpha()*right/supersample;
+			return pool.demult_alpha();
+		}
+		if(dist-supersample*0.5<0.0)
+		{
+			float  left(supersample*0.5-dist);
+			float right(supersample*0.5+dist);
+			Color pool(gradient(right*0.5,right).premult_alpha()*right/supersample);
+			if (zigzag) pool+=gradient(left*0.5,left).premult_alpha()*left/supersample;
+			else		pool+=gradient(1.0-left*0.5,left).premult_alpha()*left/supersample;
+			return pool.demult_alpha();
+		}
+	}
+
+	return gradient(dist,supersample);
+}
+
+
+float
+RadialGradient::calc_supersample(const synfig::Point &/*x*/, float pw,float /*ph*/)const
+{
+//	return sqrt(pw*pw+ph*ph)/radius;
+	return 1.2*pw/radius;
+}
+
+synfig::Layer::Handle
+RadialGradient::hit_check(synfig::Context context, const synfig::Point &point)const
+{
+	if(get_blend_method()==Color::BLEND_STRAIGHT && get_amount()>=0.5)
+		return const_cast<RadialGradient*>(this);
+	if(get_amount()==0.0)
+		return context.hit_check(point);
+	if((get_blend_method()==Color::BLEND_STRAIGHT || get_blend_method()==Color::BLEND_COMPOSITE) && color_func(point).get_a()>0.5)
+		return const_cast<RadialGradient*>(this);
+	return context.hit_check(point);
+}
+
+Color
+RadialGradient::get_color(Context context, const Point &pos)const
+{
+	const Color color(color_func(pos));
+
+	if(get_amount()==1.0 && get_blend_method()==Color::BLEND_STRAIGHT)
+		return color;
+	else
+		return Color::blend(color,context.get_color(pos),get_amount(),get_blend_method());
+}
+
+bool
+RadialGradient::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
+{
+	SuperCallback supercb(cb,0,9500,10000);
+
+	if(get_amount()==1.0 && get_blend_method()==Color::BLEND_STRAIGHT)
+	{
+		surface->set_wh(renddesc.get_w(),renddesc.get_h());
+	}
+	else
+	{
+		if(!context.accelerated_render(surface,quality,renddesc,&supercb))
+			return false;
+		if(get_amount()==0)
+			return true;
+	}
+
+
+	int x,y;
+
+	Surface::pen pen(surface->begin());
+	const Real pw(renddesc.get_pw()),ph(renddesc.get_ph());
+	Point pos;
+	Point tl(renddesc.get_tl());
+	const int w(surface->get_w());
+	const int h(surface->get_h());
+
+	if(get_amount()==1.0 && get_blend_method()==Color::BLEND_STRAIGHT)
+	{
+		for(y=0,pos[1]=tl[1];y<h;y++,pen.inc_y(),pen.dec_x(x),pos[1]+=ph)
+			for(x=0,pos[0]=tl[0];x<w;x++,pen.inc_x(),pos[0]+=pw)
+				pen.put_value(color_func(pos,calc_supersample(pos,pw,ph)));
+	}
+	else
+	{
+		for(y=0,pos[1]=tl[1];y<h;y++,pen.inc_y(),pen.dec_x(x),pos[1]+=ph)
+			for(x=0,pos[0]=tl[0];x<w;x++,pen.inc_x(),pos[0]+=pw)
+				pen.put_value(Color::blend(color_func(pos,calc_supersample(pos,pw,ph)),pen.get_value(),get_amount(),get_blend_method()));
+	}
+
+	// Mark our progress as finished
+	if(cb && !cb->amount_complete(10000,10000))
+		return false;
+
+	return true;
+}